Application of alkali-activated industrial wastes for the stabilisation of a full-scale (sub)base layer

Miranda, Tiago F. S.; Leitão, Dinis; Oliveira, Joel; Corrêa-Silva, Manuela; Araújo, Nuno Miguel Faria; Coelho, João; Fernández-Jiménez, Ana; Cristelo, Nuno

doi:10.1016/j.jclepro.2019.118427

Cited by 48 publications

(14 citation statements)

References 15 publications

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“…Un artículo publicado recientemente por Miranda et al (2020) presenta los resultados de la construcción de 80 m 2 de una capa estabilizada, de 2,5 m de ancho, utilizando diferentes cementantes, tres de los cuales se basan en el uso de ceniza volante activada alcalinamente y los dos restantes corresponden a OPC y cal considerados como materiales de referencia. En este estudio además de los ensayos técnicos, que indican que el desempeño mecánico del suelo estabilizado con ceniza activada es similar al estabilizado con los cementantes tradicionales, se realizaron análisis financieros y medioambientales.…”

Section: Estabilización Química De Suelos Con Cementantes Activados Aunclassified

Estabilización química de suelos - Materiales convencionales y activados alcalinamente (revisión)

Rivera

Aguirre-Guerrero

Gutiérrez

et al. 2020

Inf.Tec

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El creciente interés por el desarrollo de alternativas frente al uso masivo de cementantes tradicionales en aplicaciones geotécnicas, tales como cemento y cal, se debe en gran medida a los retos ambientales y costos asociados en este tipo de aplicaciones. Los cementantes activados alcalinamente surgen como una de las alternativas de mayor sostenibilidad, particularmente por su bajo consumo energético y en teoría la baja huella de carbono en su fabricación; además, tienen la posibilidad de utilizar residuos y subproductos industriales como materiales precursores en su fabricación. Este artículo presenta un estado del arte de los diversos materiales empleados convencionalmente en la estabilización química de suelos y realiza una revisión de los artículos publicados en relación con la implementación de cementantes activados alcalinamente, su viabilidad técnica, los impactos ambientales asociados y los retos que se deben superar para lograr posicionarlos como una alternativa sostenible para procesos geotécnicos.

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Section: Estabilización Química De Suelos Con Cementantes Activados Aunclassified

Estabilización química de suelos - Materiales convencionales y activados alcalinamente (revisión)

Rivera

Aguirre-Guerrero

Gutiérrez

et al. 2020

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“…Recent research has reported the effectiveness of the alkali-activated binders in soil stabilisation, with benefits on swell suppression and enhancement of strength and stiffness both at laboratory and field scale (Consoli et al, 2020;Cristelo et al, 2015;Miranda et al, 2020;Obuzor et al, 2012;Yu et al, 2020). Corrêa-Silva et al, 2019 undertook triaxial testing on a lean clayey sand stabilised with a blend of low Ca PFA and NaOH-Na 2 SiO 3 after 28 days whereby increases in the effective cohesion (200% in total peak strength) and critical state friction angle (50% and 73% in effective and total stresses, respectively) were observed.…”

Section: Introductionmentioning

confidence: 99%

Predicting the mechanical behaviour of a sandy clay stabilised with an alkali-activated binder

Corrêa-Silva

Rouainia

Miranda

et al. 2021

Engineering Geology

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“…Such residue has already been used in several researches, combined with hydrated lime, for the stabilization of a variety of soils. These materials were characterized by matching and even improving mechanical performance, both in strength and durability, compared to materials produced from Portland clinker [33,34,[36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Live-Scale Testing of Granular Materials Stabilized with Alkali-Activated Waste Glass and Carbide Lime

et al. 2021

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The increasingly strong search for alternative materials to Portland cement has resulted in the development of alkali-activated cements (AAC) that are very effective at using industrial by-products as raw materials, which also contributes to the volume reduction in landfilled waste. Several studies targeting the development of AAC—based on wastes containing silicon and calcium—for chemical stabilization of soils have demonstrated their excellent performance in terms of durability and mechanical performance. However, most of these studies are confined to a laboratory characterization, ignoring the influence and viability of the in situ construction process and, also important, of the in situ curing conditions. The present work investigated the field application of an AAC based on carbide lime and glass wastes to stabilize fine sand acting as a superficial foundation. The assessment was supported on the unconfined compressive strength (UCS) and initial shear modulus (G0) of the developed material, and the field results were compared with those prepared in the laboratory, up to 120 days curing. In situ tests were also developed on the field layers (with diameters of 450 and 900 mm and thickness of 300 mm) after different curing times. To establish a reference, the mentioned precursors were either activated with a sodium hydroxide solution or hydrated with water (given the reactivity of the lime). The results showed that the AAC-based mixtures developed greater strength and stiffness at a faster rate than the water-based mixtures. Specimens cured under controlled laboratory conditions showed better results than the samples collected in the field. The inclusion of the stabilized layers clearly increased the load-bearing capacity of the natural soil, while the different diameters produced different failure mechanisms, similar to those found in Portland cement stabilization.

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Application of alkali-activated industrial wastes for the stabilisation of a full-scale (sub)base layer

Cited by 48 publications

References 15 publications

Estabilización química de suelos - Materiales convencionales y activados alcalinamente (revisión)

Estabilización química de suelos - Materiales convencionales y activados alcalinamente (revisión)

Predicting the mechanical behaviour of a sandy clay stabilised with an alkali-activated binder

Live-Scale Testing of Granular Materials Stabilized with Alkali-Activated Waste Glass and Carbide Lime

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